PRI Low Profile Adjustable Gas Block AR-15, LR-308 0.875" with Rifle Length Gas Tube

The PRI low profile adjustable steel gas block for .875" diameter barrels allows users to regulate the gas system with an allen key. Construction is similar to the non-adjustable PRI low profile gas block. Requires a straight gas tube, which is included. The increased height of the gas block will not fit under most handguards and rail systems. Gas block is secured with 2 10-32 set screws.